EP0374014A2 - Organo-manganese compounds, their preparation and their use - Google Patents
Organo-manganese compounds, their preparation and their use Download PDFInfo
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- EP0374014A2 EP0374014A2 EP89403390A EP89403390A EP0374014A2 EP 0374014 A2 EP0374014 A2 EP 0374014A2 EP 89403390 A EP89403390 A EP 89403390A EP 89403390 A EP89403390 A EP 89403390A EP 0374014 A2 EP0374014 A2 EP 0374014A2
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- Prior art keywords
- organo
- compound
- ketone
- manganous
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- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 239000011572 manganese Substances 0.000 claims abstract description 22
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 18
- 150000008064 anhydrides Chemical class 0.000 claims abstract description 17
- 150000001875 compounds Chemical class 0.000 claims abstract description 17
- 150000003242 quaternary ammonium salts Chemical class 0.000 claims abstract description 7
- 230000009471 action Effects 0.000 claims abstract description 6
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 5
- 150000003839 salts Chemical class 0.000 claims abstract description 4
- 239000003960 organic solvent Substances 0.000 claims abstract description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 45
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 43
- 150000002576 ketones Chemical class 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 20
- -1 Mn++ compound Chemical class 0.000 claims description 15
- 239000002904 solvent Substances 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 12
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 12
- 229910052801 chlorine Inorganic materials 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 9
- 125000003118 aryl group Chemical group 0.000 claims description 8
- 229910052794 bromium Inorganic materials 0.000 claims description 8
- 125000001931 aliphatic group Chemical group 0.000 claims description 7
- 125000003342 alkenyl group Chemical group 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 7
- 125000000962 organic group Chemical group 0.000 claims description 6
- 125000001424 substituent group Chemical group 0.000 claims description 6
- JRMUNVKIHCOMHV-UHFFFAOYSA-M tetrabutylammonium bromide Chemical compound [Br-].CCCC[N+](CCCC)(CCCC)CCCC JRMUNVKIHCOMHV-UHFFFAOYSA-M 0.000 claims description 6
- 229910052736 halogen Inorganic materials 0.000 claims description 5
- 150000002367 halogens Chemical class 0.000 claims description 5
- 125000000217 alkyl group Chemical group 0.000 claims description 4
- 150000001450 anions Chemical class 0.000 claims description 4
- 238000004090 dissolution Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 150000007524 organic acids Chemical class 0.000 claims description 4
- 150000002902 organometallic compounds Chemical class 0.000 claims description 4
- 125000000524 functional group Chemical group 0.000 claims description 3
- 229910052740 iodine Inorganic materials 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 230000009466 transformation Effects 0.000 claims description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 2
- 150000001299 aldehydes Chemical class 0.000 claims description 2
- 125000004429 atom Chemical group 0.000 claims description 2
- VJGNLOIQCWLBJR-UHFFFAOYSA-M benzyl(tributyl)azanium;chloride Chemical compound [Cl-].CCCC[N+](CCCC)(CCCC)CC1=CC=CC=C1 VJGNLOIQCWLBJR-UHFFFAOYSA-M 0.000 claims description 2
- 125000004432 carbon atom Chemical group C* 0.000 claims description 2
- 125000001183 hydrocarbyl group Chemical group 0.000 claims 5
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 claims 4
- 239000000460 chlorine Substances 0.000 claims 4
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 claims 3
- 125000001246 bromo group Chemical group Br* 0.000 claims 3
- 125000001309 chloro group Chemical group Cl* 0.000 claims 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims 2
- 125000000753 cycloalkyl group Chemical group 0.000 claims 2
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 claims 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims 1
- 125000002015 acyclic group Chemical group 0.000 claims 1
- UDYGXWPMSJPFDG-UHFFFAOYSA-M benzyl(tributyl)azanium;bromide Chemical compound [Br-].CCCC[N+](CCCC)(CCCC)CC1=CC=CC=C1 UDYGXWPMSJPFDG-UHFFFAOYSA-M 0.000 claims 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims 1
- 125000004122 cyclic group Chemical group 0.000 claims 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims 1
- 150000002894 organic compounds Chemical class 0.000 claims 1
- 239000007858 starting material Substances 0.000 claims 1
- 150000004820 halides Chemical class 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 2
- 239000002253 acid Substances 0.000 abstract 1
- 238000005917 acylation reaction Methods 0.000 description 7
- 229910021380 Manganese Chloride Inorganic materials 0.000 description 6
- GLFNIEUTAYBVOC-UHFFFAOYSA-L Manganese chloride Chemical compound Cl[Mn]Cl GLFNIEUTAYBVOC-UHFFFAOYSA-L 0.000 description 6
- 230000010933 acylation Effects 0.000 description 6
- RJYMRRJVDRJMJW-UHFFFAOYSA-L dibromomanganese Chemical compound Br[Mn]Br RJYMRRJVDRJMJW-UHFFFAOYSA-L 0.000 description 6
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 description 6
- 239000011565 manganese chloride Substances 0.000 description 6
- 235000002867 manganese chloride Nutrition 0.000 description 6
- 125000002734 organomagnesium group Chemical group 0.000 description 6
- 239000000725 suspension Substances 0.000 description 6
- 238000003786 synthesis reaction Methods 0.000 description 6
- 229910021568 Manganese(II) bromide Inorganic materials 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 150000002430 hydrocarbons Chemical group 0.000 description 4
- 125000001453 quaternary ammonium group Chemical group 0.000 description 4
- 239000012429 reaction media Substances 0.000 description 4
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 150000004292 cyclic ethers Chemical class 0.000 description 3
- 150000002170 ethers Chemical class 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- ODIGIKRIUKFKHP-UHFFFAOYSA-N (n-propan-2-yloxycarbonylanilino) acetate Chemical compound CC(C)OC(=O)N(OC(C)=O)C1=CC=CC=C1 ODIGIKRIUKFKHP-UHFFFAOYSA-N 0.000 description 2
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 2
- 101000687448 Homo sapiens REST corepressor 1 Proteins 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- 102100024864 REST corepressor 1 Human genes 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- 239000008346 aqueous phase Substances 0.000 description 2
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 125000003187 heptyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 150000002697 manganese compounds Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- WWZKQHOCKIZLMA-UHFFFAOYSA-N octanoic acid Chemical compound CCCCCCCC(O)=O WWZKQHOCKIZLMA-UHFFFAOYSA-N 0.000 description 2
- 235000005985 organic acids Nutrition 0.000 description 2
- 239000012074 organic phase Substances 0.000 description 2
- 125000001979 organolithium group Chemical group 0.000 description 2
- 125000002524 organometallic group Chemical group 0.000 description 2
- NHGXDBSUJJNIRV-UHFFFAOYSA-M tetrabutylammonium chloride Chemical compound [Cl-].CCCC[N+](CCCC)(CCCC)CCCC NHGXDBSUJJNIRV-UHFFFAOYSA-M 0.000 description 2
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- OKIZCWYLBDKLSU-UHFFFAOYSA-M N,N,N-Trimethylmethanaminium chloride Chemical compound [Cl-].C[N+](C)(C)C OKIZCWYLBDKLSU-UHFFFAOYSA-M 0.000 description 1
- MZRVEZGGRBJDDB-UHFFFAOYSA-N N-Butyllithium Chemical compound [Li]CCCC MZRVEZGGRBJDDB-UHFFFAOYSA-N 0.000 description 1
- XICGRFVPPOACHA-UHFFFAOYSA-N NBBr Chemical compound NBBr XICGRFVPPOACHA-UHFFFAOYSA-N 0.000 description 1
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical class [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 1
- VBIIFPGSPJYLRR-UHFFFAOYSA-M Stearyltrimethylammonium chloride Chemical compound [Cl-].CCCCCCCCCCCCCCCCCC[N+](C)(C)C VBIIFPGSPJYLRR-UHFFFAOYSA-M 0.000 description 1
- WFUVUIVBRQPIHK-UHFFFAOYSA-L [Br-].C(C1=CC=CC=C1)[N+](CCCC)(CCCC)CCCC.[Cl-].C(C1=CC=CC=C1)[N+](CCCC)(CCCC)CCCC Chemical compound [Br-].C(C1=CC=CC=C1)[N+](CCCC)(CCCC)CCCC.[Cl-].C(C1=CC=CC=C1)[N+](CCCC)(CCCC)CCCC WFUVUIVBRQPIHK-UHFFFAOYSA-L 0.000 description 1
- 150000008065 acid anhydrides Chemical class 0.000 description 1
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 description 1
- 125000005210 alkyl ammonium group Chemical group 0.000 description 1
- 125000000304 alkynyl group Chemical group 0.000 description 1
- OBETXYAYXDNJHR-UHFFFAOYSA-N alpha-ethylcaproic acid Natural products CCCCC(CC)C(O)=O OBETXYAYXDNJHR-UHFFFAOYSA-N 0.000 description 1
- SWLVFNYSXGMGBS-UHFFFAOYSA-N ammonium bromide Chemical compound [NH4+].[Br-] SWLVFNYSXGMGBS-UHFFFAOYSA-N 0.000 description 1
- 125000001204 arachidyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 229960001716 benzalkonium Drugs 0.000 description 1
- CYDRXTMLKJDRQH-UHFFFAOYSA-N benzododecinium Chemical compound CCCCCCCCCCCC[N+](C)(C)CC1=CC=CC=C1 CYDRXTMLKJDRQH-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 238000010668 complexation reaction Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- NIXOIRLDFIPNLJ-UHFFFAOYSA-M magnesium;benzene;bromide Chemical compound [Mg+2].[Br-].C1=CC=[C-]C=C1 NIXOIRLDFIPNLJ-UHFFFAOYSA-M 0.000 description 1
- LWLPYZUDBNFNAH-UHFFFAOYSA-M magnesium;butane;bromide Chemical compound [Mg+2].[Br-].CCC[CH2-] LWLPYZUDBNFNAH-UHFFFAOYSA-M 0.000 description 1
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical class [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F13/00—Compounds containing elements of Groups 7 or 17 of the Periodic Table
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C211/00—Compounds containing amino groups bound to a carbon skeleton
- C07C211/65—Metal complexes of amines
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F13/00—Compounds containing elements of Groups 7 or 17 of the Periodic Table
- C07F13/005—Compounds without a metal-carbon linkage
Definitions
- the invention relates to a new series of organic derivatives of divalent manganese; it includes a process for their production, as well as applications for the synthesis of ketones.
- organo-manganese have imposed themselves in chemical synthesis, making it possible to prepare different bodies conveniently, with good yields.
- Such are, for example, the cases of alcohols, carboxylic acids or ketones, a large number of which can be produced via organo-manganous compounds in a solvent.
- organo-manganous are used, mainly mixed, RMnX, where R is an organic group and X most often a halogen; but we also use products of the R2Mn, R3MnLi, R3MnMgX, R4MnLi2, R4Mn (MgX) type type, etc.
- organo-manganese such as RMnBr and RMnCl by the reaction of the corresponding manganese halide, with an organo-magnesian or even with an organolithian, encounters certain difficulties, due to the insolubility of these halides in the most common solvents, such as tetrahydrofuran or diethyl ether.
- the mixed brominated and chlorinated organo-manganous could not be quantitatively prepared in ether and, therefore, any subsequent reactions such as the acylation of these compounds, led at average yields of ketones.
- the present invention widens the field of possibilities of organo-manganese by the discovery of a new class of manganese compounds and their organic derivatives.
- it makes it possible to solve, in a simple manner, the problems posed by the insolubility of manganese halides in common solvents and by the insufficient reactivity of the corresponding organo-manganous.
- the new compounds according to the invention are manganese compounds, characterized in that they are complexed with quaternary ammonium salts. They can be represented by the general formula in which Y and X are elements or groups which may be anions, identical or different, or else X and / or Y are constituted by hydrocarbon groups; X ′ is a monovalent anion; R to R3, similar or different, are C1 to C18 alkyls and / or alkenyls and / or aryls, while R4 is C1 to C20 alkyl or alkenyl, or alternatively C un to C20 cycloalkyl or aryl, each hydrocarbon groups which can carry aliphatic, aromatic, ethylenic substituents or certain functional groups, R4 may contain a number of atoms of C greater than that of each of R1 to R3; m is a number from 1 to 3, preferably 1, n being a number from 1 to 10 and preferably 1 or 2; M is Li or Mg
- p (RM) .m (MnXY) can be R2Mn, R3MnLi, R4MnLi2, R3MnMgX or R4Mn (MX) 2.
- the quaternary amnonium group X′-N can have: tetramethyl ammonium chloride, trimethyl stearyl ammonium chloride, dimethyl dihexyl amnonium chloride tripropyl decyl chloride ammonium diethyl butyl benzyl ammonium chloride dimethyl benzyl chloride C8 to C18 alkyl ammonium (“BENZALKONIUM”) tetrabutyl ammonium chloride or bromide tributyl benzyl ammonium chloride or bromide dimethyl lauryl benzyl amnonium bromide trimethyl cetyl ammonium bromide trimethyl lauryl ammonium bromide diethyl propyl oleyl ammonium bromide dimethyl isopropyl eicosyl ammonium bromide
- Y is a hydrocarbon group
- R can be any organic group that the prior art makes it possible to have in a magnesian or a lithian.
- alkyls, alkenyls and alkynyls which may bear substituents.
- Such aliphatic groups most often have 1 to 20 carbon atoms.
- the complexed compounds according to the invention in particular the compounds of type MnCl2.N (R1R2R3R4) X ′ or MnBr2.N (R1R2R3R4) X ′ are generally soluble in certain organic solvents, in particular in the ethers used for the syntheses carried out with from organo-manganese. This therefore makes it possible to conveniently use the manganese halides insoluble in these solvents.
- the present invention relates in particular to partial solutions of MnBr2.N (R1R2R3R4) Br (in the form of a thick homogeneous gel) in diethyl ether or in other liquid acyclic aliphatic ethers, as well as solutions of MnX2.N (R1R2R3R4 ) X ′ (X and X ′ being Cl or Br) in tetrahydrofuran or other liquid cyclic ethers.
- the preparation of the products of formula (2) according to the invention consists in agitating an Mn++ compound, preferably a bromide or a chloride, with a quaternary ammonium salt in an appropriate solvent for this latter salt, up to complete or partial dissolution of these reagents.
- Mn++ compound preferably a bromide or a chloride
- a quaternary ammonium salt in an appropriate solvent for this latter salt, up to complete or partial dissolution of these reagents.
- the preferred solvents being ethers, in particular ethyl ether (in the case of MnBr2) or tetrahydrofuran (in that of MnCl2), these solvents are anhydrous; it is generally carried out with amounts of reagents of approximately 0.1 to 2 moles per liter, ie of the order of 0.5 moles / liter. We operate at room temperature.
- the equimolecular ratio is recommendable between the Mn compound and the quaternary ammonium, it may possibly be different.
- the complex compound When the complex compound is in solution or suspension, it can be used directly to carry out syntheses by adding the body which it is desired to react with RMnX.
- the complex (3) it makes it possible to carry out all the syntheses which it is known to operate by means of the organo-manganous indicated in the chemical literature and recalled at the beginning of this description.
- the organo-manganous indicated in the chemical literature and recalled at the beginning of this description.
- it can it be used for the carbonation of its R group, for the transformation of aldehydes or ketones into alcohols, for obtaining ketones by acylation of R, etc.
- the principle of these various reactions being known in the art, there is no need here to give the detail of all these reactions, some of which are often accelerated by the presence of the complexing part of the organo-manganous.
- the complexes (3) according to the invention are particularly effective for carrying out acylation reactions of the RMnX + R′COZ ⁇ RCOR ′ + MnXZ type, the yield of ketone obtained being able in certain cases , be considerably improved: thus the acylation by R′COCl, in ether, of an RMnBr, obtained according to the prior art, leads to ketone yields of the order of 50%, while with an RMnBr complexed with a quaternary ammonium according to the invention, the yields can be greater than 80%.
- the organo-manganese, prepared in tetrahydrofuran do not make it possible to carry out, in this solvent, certain acylations with acylating agents, such as mixed anhydrides.
- ketones by the action of halides or acid anhydrides, as acylating agents, on organo-manganese is known in the art, and it generally gives good results.
- difficulties arise especially when the acylating agent is a mixed anhydride of the R′COOCOOR ⁇ type, the use of which would however be advantageous in certain cases, because it can be obtained under mild conditions.
- the organo-manganese BuMnCl is prepared in the presence of LiCl and, in the other case, the same organo-manganous is prepared according to Example 5.
- Example 8 The ketone is then isolated as in Example 8.
- the yield obtained according to the prior art is 54%, and with the complex according to the invention of 83% in BuCOBr, which highlights the determining role played by the complexation of MnBr2 during the preparation of BuMnBr.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Catalysts (AREA)
Abstract
Description
L'invention se rapporte à une nouvelle série de dérivés organiques du manganèse divalent ; elle comprend un procédé pour leur production, ainsi que des applications à la synthèse de cétones.The invention relates to a new series of organic derivatives of divalent manganese; it includes a process for their production, as well as applications for the synthesis of ketones.
Au cours de la dernière décennie, les organo-manganeux se sont imposés dans la synthèse chimique, permettant de préparer différents corps commodément, avec de bons rendements. Tels sont, par exemple, les cas des alcools, des acides carboxyliques ou des cétones dont un grand nombre peuvent être produits par l'intermédiaire de composés organo-manganeux au sein d'un solvant. Divers organo-manganeux sont employés, principalement des mixtes, RMnX, où R est un groupe organique et X le plus souvent un halogène ; mais on utilise également des produits du type R₂Mn, R₃MnLi, R₃MnMgX, R₄MnLi₂, R₄Mn(MgX)₂, etc.During the last decade, organo-manganese have imposed themselves in chemical synthesis, making it possible to prepare different bodies conveniently, with good yields. Such are, for example, the cases of alcohols, carboxylic acids or ketones, a large number of which can be produced via organo-manganous compounds in a solvent. Various organo-manganous are used, mainly mixed, RMnX, where R is an organic group and X most often a halogen; but we also use products of the R₂Mn, R₃MnLi, R₃MnMgX, R₄MnLi₂, R₄Mn (MgX) type type, etc.
Toutefois, la préparation des organo-manganeux tels que RMnBr et RMnCl par la réaction de l'halogénure de manganèse correspondant, avec un organo-magnésien voire avec un organolithien, se heurte à certaines difficultés, en raison de l'insolubilité de ces halogénures dans les solvants les plus courants, tels que le tétrahydrofuranne ou l'éther diéthylique. Jusqu'à ces dernières années, par exemple, les organo-manganeux mixtes bromés et chlorés n'ont pas pu être préparés quantitativement dans l'éther et, de ce fait, toutes réactions, ultérieures telles que l'acylation de ces composés, conduisaient à des rendements moyens en cétones. D'ailleurs, dans le tétrahydrofuranne,on est obligé d'employer un sel complexe soluble MnCl₂,nLiCl pour effectuer la reaction avec RMgX,afin de former le RMnCl voulu. Cependant, l'utilisation des organo-manganeux ainsi préparés dans le tétrahydro furanne n'a pas permis jusqu'à maintenant d'effectuer convenablement certaines réactions.However, the preparation of organo-manganese such as RMnBr and RMnCl by the reaction of the corresponding manganese halide, with an organo-magnesian or even with an organolithian, encounters certain difficulties, due to the insolubility of these halides in the most common solvents, such as tetrahydrofuran or diethyl ether. Until recent years, for example, the mixed brominated and chlorinated organo-manganous could not be quantitatively prepared in ether and, therefore, any subsequent reactions such as the acylation of these compounds, led at average yields of ketones. Moreover, in tetrahydrofuran, it is necessary to use a soluble complex salt MnCl₂, nLiCl to carry out the reaction with RMgX, in order to form the desired RMnCl. However, the use of organo-manganese thus prepared in tetrahydro Furanne has so far not allowed certain reactions to be carried out properly.
Ainsi, lors de la réaction d'un anhydride mixte avec un organo-manganeux chloré dans le tétrahydrofuranne, on constate qu'il se forme en majeure partie de l'ester au lieu de la cétone attendue.Thus, during the reaction of a mixed anhydride with an organo-manganese chlorinated in tetrahydrofuran, it is observed that a major part of the ester is formed instead of the expected ketone.
La présente invention élargit le champ des possibilités des organo-manganeux par la découverte d'une nouvelle classe de composés de manganèse et de leurs dérivés organiques. Elle permet notamment de résoudre, de façon simple,les problèmes posés par l'insolubilité des halogénures de manganèse dans les solvants courants et par la réactivité insuffisante des organo-manganeux correspondants.The present invention widens the field of possibilities of organo-manganese by the discovery of a new class of manganese compounds and their organic derivatives. In particular, it makes it possible to solve, in a simple manner, the problems posed by the insolubility of manganese halides in common solvents and by the insufficient reactivity of the corresponding organo-manganous.
Les nouveaux composés suivant l'invention sont des composés manganeux, caractérisés en ce qu'ils sont complexés avec des sels d'ammoniums quaternaires. Ils peuvent être représentés par la formule générale
A titre d'exemples non limitatifs, voici quelques unes des constitutions que peut présenter le groupe amnonium quaternaire X′-N(R¹R²R³R⁴):
chlorure de tétraméthyl ammonium,
chlorure de triméthyl stéaryle ammonium,
chlorure de diméthyl dihexyle amnonium
chlorure de tripropyl décyle ammonium
chlorure de diéthyl butyl benzyle ammonium
chlorure de diméthyl benzyl alkyles en C₈ à C₁₈ ammonium ("BENZALKONIUM")
chlorure ou bromure de tétrabutyl ammonium
chlorure ou bromure de tributyl benzyl ammonium
bromure de diméthyl lauryl benzyle amnonium
bromure de triméthyl cétyl ammonium
bromure de triméthyl lauryl ammonium
bromure de diéthyl propyl oléyl ammonium
bromure de diméthyl isopropyl eicosyl ammonium
Les composés, dans lesquels Y est un groupe hydrocarboné R, c'est-à-dire les organo-manganeux complexés avec un ammonium quaternaire :
RMnX.N(R¹R²R³R⁴)X′ (3)
peuvent porter en R des groupes très divers, aliphatiques cycloaliphatiques, aryliques, pouvant comporter certains substituants fonctionnels. Comme le complexe de formule (3) est généralement obtenu par l'action d'un organo-métallique dérivé d'un métal plus électropositif que Mn, surtout un magnésien (RMgX) ou lithien (RLi), sur le composé de formule (1) transcrite ici sous la forme :
MnX₂.N(R¹R²R³R⁴)X′ (2)
R peut être tout groupe organique que la technique antérieure permet d'avoir dans un magnésien ou un lithien. Ainsi, en tant qu'exemple seulement, on peut citer les alkyles, alcényles et alcynyles, pouvant porter des substituants. De tels groupes aliphatiques ont le plus souvent 1 à 20 atomes de carbone.The new compounds according to the invention are manganese compounds, characterized in that they are complexed with quaternary ammonium salts. They can be represented by the general formula
By way of nonlimiting examples, here are some of the constitutions that the quaternary amnonium group X′-N (R¹R²R³R⁴) can have:
tetramethyl ammonium chloride,
trimethyl stearyl ammonium chloride,
dimethyl dihexyl amnonium chloride
tripropyl decyl chloride ammonium
diethyl butyl benzyl ammonium chloride
dimethyl benzyl chloride C₈ to C₁₈ alkyl ammonium ("BENZALKONIUM")
tetrabutyl ammonium chloride or bromide
tributyl benzyl ammonium chloride or bromide
dimethyl lauryl benzyl amnonium bromide
trimethyl cetyl ammonium bromide
trimethyl lauryl ammonium bromide
diethyl propyl oleyl ammonium bromide
dimethyl isopropyl eicosyl ammonium bromide
The compounds, in which Y is a hydrocarbon group R, that is to say the organo-manganous complexed with a quaternary ammonium:
RMnX.N (R¹R²R³R⁴) X ′ (3)
can carry in R very diverse groups, aliphatic cycloaliphatic, aryl, which may include certain functional substituents. As the complex of formula (3) is generally obtained by the action of an organometallic derivative of a metal more electropositive than Mn, especially a magnesian (RMgX) or lithian (RLi), on the compound of formula (1 ) transcribed here in the form:
MnX₂.N (R¹R²R³R⁴) X ′ (2)
R can be any organic group that the prior art makes it possible to have in a magnesian or a lithian. Thus, by way of example only, mention may be made of alkyls, alkenyls and alkynyls, which may bear substituents. Such aliphatic groups most often have 1 to 20 carbon atoms.
Les composés complexés suivant l'invention, en particulier les composés de type MnCl₂.N(R¹R²R³R⁴)X′ ou MnBr₂.N(R¹R²R³R⁴)X′ sont en général solubles dans certains solvants organiques, notamment dans les éthers utilisés pour les synthèses effectuées à partir des organo-manganeux. Cela permet donc d'utiliser commodément les halogénures de manganèse insolubles dans ces solvants. La présente invention concerne en particulier des solutions partielles de MnBr₂.N(R¹R²R³R⁴)Br (sous forme de gel homogène épais) dans l'éther diéthylique ou dans d'autres éthers aliphatiques acycliques liquides, ainsi que des solutions de MnX₂.N(R¹R²R³R⁴)X′ (X et X′ étant Cl ou Br) dans le tétrahydrofuranne ou d'autres éthers cycliques liquides.The complexed compounds according to the invention, in particular the compounds of type MnCl₂.N (R¹R²R³R⁴) X ′ or MnBr₂.N (R¹R²R³R⁴) X ′ are generally soluble in certain organic solvents, in particular in the ethers used for the syntheses carried out with from organo-manganese. This therefore makes it possible to conveniently use the manganese halides insoluble in these solvents. The present invention relates in particular to partial solutions of MnBr₂.N (R¹R²R³R⁴) Br (in the form of a thick homogeneous gel) in diethyl ether or in other liquid acyclic aliphatic ethers, as well as solutions of MnX₂.N (R¹R²R³R⁴ ) X ′ (X and X ′ being Cl or Br) in tetrahydrofuran or other liquid cyclic ethers.
La préparation des produits de formule (2) suivant l'invention consiste à agiter un composé de Mn⁺⁺, de préférence un bromure ou un chlorure, avec un sel d'ammonium quaternaire dans un solvant approprié de ce dernier sel, jusqu'à dissolution complète ou partielle de ces réactifs. Les solvants préférés étant des éthers, notamment l'éther éthylique (dans le cas de MnBr₂) ou le tétrahydrofuranne (dans celui de MnCl₂) , ces solvants sont anhydres ; on opère en général avec des quantités de réactifs d'environ 0,1 à 2 moles par litre, soit de l'ordre de 0,5 mole/litre. On opère à la température ambiante.The preparation of the products of formula (2) according to the invention consists in agitating an Mn⁺⁺ compound, preferably a bromide or a chloride, with a quaternary ammonium salt in an appropriate solvent for this latter salt, up to complete or partial dissolution of these reagents. The preferred solvents being ethers, in particular ethyl ether (in the case of MnBr₂) or tetrahydrofuran (in that of MnCl₂), these solvents are anhydrous; it is generally carried out with amounts of reagents of approximately 0.1 to 2 moles per liter, ie of the order of 0.5 moles / liter. We operate at room temperature.
Bien que le rapport équimoléculaire soit recommandable entre le composé du Mn et l'ammonium quaternaire, il peut éventuellement être différent.Although the equimolecular ratio is recommendable between the Mn compound and the quaternary ammonium, it may possibly be different.
La préparation décrite ci-dessus conduit au produit de la formule (2) à l'état partiellement ou totalement dissous dans le solvant choisi. La solution obtenue peut servir au passage à la formule (3) par l'addition d'un organo-métallique dérivé d'un métal plus électropositif que le Mn. Cela peut avoir lieu selon la réaction :
(4) MnX₂.N(R¹R²R³R⁴)X′ + RMgX (ou RLi) → RMnX.N(R¹R²R³R⁴)X′ + MgX₂ (ou LiX) (formule 3)The preparation described above leads to the product of formula (2) in the state partially or completely dissolved in the chosen solvent. The solution obtained can be used for the transition to formula (3) by the addition of an organometallic derivative of a more electropositive metal than Mn. This can take place depending on the reaction:
(4) MnX₂.N (R¹R²R³R⁴) X ′ + RMgX (or RLi) → RMnX.N (R¹R²R³R⁴) X ′ + MgX₂ (or LiX) (formula 3)
Suivant la présente invention, on peut notamment ajouter au complexe MnBr₂.N(R¹R²R³R⁴)Br à l'état partiellement dissous dans l'éther diéthylique ou dans d'autres éthers aliphatiques acycliques, liquides, un composé organo-métallique, de préférence un organo-magnésien de formule RMgX(X=Cl, Br ou I, de préférence Br) ou un organolithien pour obtenir en suspension ou en solution dans l'éther un composé complexe de RMnBr et de N(R¹R²R³R⁴)Br (dont la présence stabilise RMnBr). On peut également ajouter au complexe MnX₂.N(R¹R²R³R⁴)X′ (X et X′ étant Cl ou Br) dissous dans le tétrahydrofuranne, ou dans d'autres éthers cycliques liquides, un composé organo-métallique de préférence un organo-magnésien de formule RMgX˝ (X˝=Cl, Br ou I) ou un organolithien pour obtenir une solution dans le tétrahydrofuranne d'un complexe de RMnX (de préférence RMnCl) et de N(R¹R²R³R⁴)X′ (de préférence N(R¹R²R³R⁴)Cl).According to the present invention, it is possible in particular to add to the complex MnBr₂.N (R¹R²R³R⁴) Br in the partially dissolved state in diethyl ether or in other acyclic aliphatic ethers, liquids, an organometallic compound, preferably an organo -magnesian of formula RMgX (X = Cl, Br or I, preferably Br) or an organolithium to obtain in suspension or in solution in ether a complex compound of RMnBr and N (R¹R²R³R⁴) Br (whose presence stabilizes RMnBr ). It is also possible to add to the complex MnX₂.N (R¹R²R³R⁴) X ′ (X and X ′ being Cl or Br) dissolved in tetrahydrofuran, or in other liquid cyclic ethers, an organo-metallic compound preferably an organo-magnesium of formula RMgX˝ (X˝ = Cl, Br or I) or an organolithium to obtain a solution in tetrahydrofuran of a complex of RMnX (preferably RMnCl) and N (R¹R²R³R⁴) X ′ (preferably N (R¹R²R³R⁴) Cl ).
Lorsque le composé complexe est en solution ou suspension, celle-ci peut servir directement à réaliser des synthèses par addition du corps que l'on veut faire réagir avec RMnX.When the complex compound is in solution or suspension, it can be used directly to carry out syntheses by adding the body which it is desired to react with RMnX.
Il y a lieu de noter que - dans le choix du solvant - on peut avoir recours pour la réalisation de ces synthèses organiques à des mélanges d'éthers avec des cosolvants, par exemple esters, comme acétate d'éthyle ou autre, acétonitrile, carbonate d'éthyle, ou certains hydrocarbures aromatiques ou aliphatiques (benzène, toluène,cyclohexane, hexane par exemple) etc., ce choix étant à la portée de l'homme de l'art. On peut les utiliser également dans la préparation des organo-manganeux. Quant au complexe (3), suivant l'invention, il permet de réaliser toutes les synthèses qu'il est connu d'opérer au moyen des organo-manganeux indiqués dans la littérature chimique et rappelés au début de la présente description. Ainsi, par exemple, peut-on l'utiliser à la carbonatation de son groupe R, à la transformation d'aldéhydes ou cétones en alcools, à l'obtention de cétones par acylation de R , etc. Le principe de ces diverses réactions étant connu dans l'art, il n'y a pas lieu ici de donner le détail de toutes ces réactions, dont certaines sont souvent accélérées par la présence de la partie complexante de l'organo-manganeux.It should be noted that - in the choice of the solvent - one can have recourse for the realization of these organic syntheses to mixtures of ethers with co-solvents, for example esters, like ethyl acetate or other, acetonitrile, carbonate ethyl, or certain aromatic or aliphatic hydrocarbons (benzene, toluene, cyclohexane, hexane for example) etc., this choice being within the reach of ordinary skill in the art. They can also be used in the preparation of organo-manganese. As for the complex (3), according to the invention, it makes it possible to carry out all the syntheses which it is known to operate by means of the organo-manganous indicated in the chemical literature and recalled at the beginning of this description. Thus, for example, can it be used for the carbonation of its R group, for the transformation of aldehydes or ketones into alcohols, for obtaining ketones by acylation of R, etc. The principle of these various reactions being known in the art, there is no need here to give the detail of all these reactions, some of which are often accelerated by the presence of the complexing part of the organo-manganous.
Il est toutefois nécessaire d'indiquer que les complexes (3) suivant l'invention sont particulièrement efficaces pour effectuer les réactions d'acylation du type RMnX + R′COZ → RCOR′ + MnXZ, le rendement en cétone obtenue pouvant, dans certains cas, être considérablement amélioré : ainsi l'acylation par R′COCl,dans de l'éther,d'un RMnBr, obtenu selon l'art antérieur, conduit à des rendements en cétone de l'ordre de 50%, tandis qu'avec un RMnBr complexé avec un ammonium quaternaire suivant l'invention, les rendements peuvent être supérieure à 80%.It is however necessary to indicate that the complexes (3) according to the invention are particularly effective for carrying out acylation reactions of the RMnX + R′COZ → RCOR ′ + MnXZ type, the yield of ketone obtained being able in certain cases , be considerably improved: thus the acylation by R′COCl, in ether, of an RMnBr, obtained according to the prior art, leads to ketone yields of the order of 50%, while with an RMnBr complexed with a quaternary ammonium according to the invention, the yields can be greater than 80%.
Comme on l'a déjà indiqué au début de la présente description, les organo-manganeux, préparés dans le tétrahydrofuranne, ne permettent d'effectuer convenablement dans ce solvant certaines acylations avec des agents acylants, tels que les anhydrides mixtes. Suivant une application de la présente invention, on peut utiliser les complexes de formule (3) pour effectuer, dans le tétrahydrofuranne ou dans d'autres éthers cycliques liquides, des réactions avec les divers agents acylants R′COZ connus tels que les halogénures d'acides organiques R′COX (X= halogène de préférence Cl), les anhydrides d'acides organiques tels que (R′CO)₂O, R′COOCOR˝, R′COOCOOR˝, R′ et R˝ semblables ou différents pouvant être des groupements organiques tous variés notamment aliphatiques, cycloaliphatiques ou aromatiques, substitués, le cas échéant, par des groupes fonctionnels. Les améliorations apportées par l'invention sont particulièrement nettes dans le cas des anhydrides mixtes R′COOCOOR˝, les rendements en cétone selon l'état de la technique pouvant passer d'environ 30% (non reproductibles suivant l'état de la technique) à environ 80° suivant la présente invention.As already indicated at the beginning of this description, the organo-manganese, prepared in tetrahydrofuran, do not make it possible to carry out, in this solvent, certain acylations with acylating agents, such as mixed anhydrides. According to an application of the present invention, the complexes of formula (3) can be used to carry out, in tetrahydrofuran or in other liquid cyclic ethers, reactions with the various known acylating agents R′COZ such as halides of organic acids R′COX (X = preferably halogen Cl), the anhydrides of organic acids such as (R′CO) ₂O, R′COOCOR˝, R′COOCOOR˝, R ′ and R˝ which may be similar or different, which may be organic groups all varied, in particular aliphatic, cycloaliphatic or aromatic, substituted, where appropriate, by functional groups. The improvements brought about by the invention are particularly marked in the case of the mixed anhydrides R′COOCOOR˝, the yields in ketone according to the state of the art being able to increase by approximately 30% (not reproducible according to the state of the art) at about 80 ° according to the present invention.
L'invention est illustrée par les exemples non limitatifs qui suivent.The invention is illustrated by the following nonlimiting examples.
Dans 80 ml d'éther éthylique anhydre, on introduit 52 mmoles de MnBr₂ anhydre (11,2g) avec 50 mmoles (16,7g) de bromure de tétrabutylammonium Bu₄NBr anhydre. Le mélange, maintenu à la température ambiante, est agité continuellement. Après 3 heures d'agitation, le milieu se présente sous la forme d'un gel homogène épais.52 mmol of anhydrous MnBr 52 (11.2 g) are introduced into 80 ml of anhydrous ethyl ether with 50 mmol (16.7 g) of anhydrous tetrabutylammonium bromide Bu₄NBr. The mixture, maintained at room temperature, is continuously stirred. After 3 hours of stirring, the medium is in the form of a thick homogeneous gel.
Dans 100 ml de tétrahydrofuranne anhydre, on mélange 52 mmoles de MnCl₂ anhydre (6,6g) avec 63,2 mmoles de chlorure de tributyl benzyl ammonium (20,6g) anhydre.
On a ainsi obtenu une solution du complexe de MnCl₂ avec ClN(Bu)₃PhCH₂ dans du THF.In 100 ml of anhydrous tetrahydrofuran, 52 mmol of anhydrous MnCl₂ (6.6 g) are mixed with 63.2 mmol of anhydrous tributyl benzyl ammonium chloride (20.6 g).
A solution of the MnCl₂ complex with ClN (Bu) ₃PhCH₂ in THF was thus obtained.
De la même manière qu'à l'exemple 2, on fait réagir 52 mmoles de MnCl₂ anhydre (6,6g) avec 50 mmoles de bromure de tétrabutyl ammonium (16,7 g) dans 80 ml de THF à 20°C. La dissolution complète a eu lieu après 4 heures d'agitation.In the same way as in Example 2, 52 mmol of anhydrous MnCl₂ (6.6 g) are reacted with 50 mmol of tetrabutyl ammonium bromide (16.7 g) in 80 ml of THF at 20 ° C. The complete dissolution took place after 4 hours of stirring.
A la solution de 52 mmoles de complexe, dans 100 ml de THF anhydre, obtenu selon l'exemple 3, on ajoute, à 0°C à l'abri de l'air, 50 mmoles de l'organo-magnésien C₄H₉MgCl (ou 50mmoles de BuLi à -30°C) en solution dans 100 ml de THF. Après 15 minutes d'agitation à la température ambiante, on obtient dans les deux cas une solution de BuMnCl complexé par NBu₄Br.To the solution of 52 mmol of complex, in 100 ml of anhydrous THF, obtained according to Example 3, 50 mmol of the organo-magnesium C₄H₉MgCl (or 50mmol of BuLi at -30 ° C) in solution in 100 ml of THF. After 15 minutes of stirring at room temperature, a BuMnCl solution complexed with NBu₄Br is obtained in both cases.
A la solution de 52 mmoles de complexe anhydre dans 100ml de THF anhydre, obtenu selon l'exemple 2, on ajoute à 0°C, à l'abri de l'air 50 mmoles de l'organo-magnésien C₄H₉MgCl en solution dans le THF. Après 15 minutes d'agitation à la température ambiante, on obtient une solution de BuMnCl complexé par ClN(Bu₃)PhCH₂To the solution of 52 mmol of anhydrous complex in 100 ml of anhydrous THF, obtained according to Example 2, 50 mmol of the organo-magnesium C₄H₉MgCl dissolved in the THF. After 15 minutes of stirring at room temperature, a BuMnCl solution complexed with ClN (Bu₃) PhCH₂ is obtained.
50 mmoles d'organo-magnésien BuMgBr en solution dans l'éther sont ajoutés à 0°C à 52 mmoles du complexe obtenu selon l'exemple 1. Après 1 heure d'agitation, à +10°C, on obtient une suspension marron foncé de BuMnBr complexé par NBu₄Br.50 mmol of organomagnesium BuMgBr dissolved in ether are added at 0 ° C to 52 mmol of the complex obtained according to Example 1. After 1 hour of stirring, at + 10 ° C, a brown suspension is obtained BuMnBr dark complexed by NBu₄Br.
50 mmoles d'organo-magnésien PhMgBr en solution dans l'éther sont ajoutés à 52 mmoles du complexe obtenu selon l'exemple 1. Après 4 heures d'agitation à +10°C, on ob tient une suspension verte de PhMnBr complexé par NBu₄Br.50 mmol of organo-magnesium PhMgBr in solution in ether are added to 52 mmol of the complex obtained according to example 1. After 4 hours of stirring at + 10 ° C., one obtains holds a green suspension of PhMnBr complexed by NBu₄Br.
La préparation de cétones par l'action d'halogénures ou d'anhydrides d'acides, en tant qu'agents acylants, sur des organo-manganeux est connue dans l'art, et elle donne en général de bons résultats. Mais,comme exposé plus haut,des difficultés surgissent surtout lorsque l'agent acylant est un anhydride mixte du type R′COOCOOR˝, dont l'emploi serait pourtant intéressant dans certains cas, parce qu'il peut être obtenu dans des conditions douces. On a donc essayé d'acyler C₄H₉MnCl comparativement, au moyen de l'anhydride symétrique de l'acide octanoïque, (C₇H₁₅CO)₂O, et à l'aide de l'anhydride mixte C₇H₁₅COOCOOC₂H₅. Dans un cas, l'organo-manganeux BuMnCl est préparé en présence de LiCl et, dans l'autre cas, le même organo-manganeux est préparé selon l'exemple 5.The preparation of ketones by the action of halides or acid anhydrides, as acylating agents, on organo-manganese is known in the art, and it generally gives good results. However, as explained above, difficulties arise especially when the acylating agent is a mixed anhydride of the R′COOCOOR˝ type, the use of which would however be advantageous in certain cases, because it can be obtained under mild conditions. One thus tried to acylate C₄H₉MnCl comparatively, by means of the symmetrical anhydride of octanoic acid, (C₇H₁₅CO) ₂O, and using the mixed anhydride C₇H₁₅COOCOOC₂H₅. In one case, the organo-manganese BuMnCl is prepared in the presence of LiCl and, in the other case, the same organo-manganous is prepared according to Example 5.
Dans chacune des quatre opérations, relatées dans le tableau ci-après, on mélangeait 50 mmoles d'anhydride avec 52 mmoles de BuMncl respectivement sous les deux formes susindiquées, dans 100 ml de THF à -30°C. On ramenait ensuite la température à l'ambiante et on agitait le milieu réactionnel durant 2 heures. Le milieu réactionnel était alors traité avec 90 ml de solution aqueuse de HCl 1N : la phase aqueuse décantée était soumise à deux extractions, chacune avec 50 ml de THF. Les phases organiques réunies étaient lavées avec deux fois 50 ml de solution saturée de K₂CO₃ dans l'eau. Après séchage sur du MgSO₄ anhydre, et évaporation des solutions sous vide,la cétone produite était isolée par distillation. Voici les rendements en pourcentage de butyl heptyl cé tone obtenue dans chacun des quatre essais effectués.
Des acylations analogues à celles de l'exemple 8 ont été effectuées au moyen d'anhydrides mixtes R′COOCOOC₂H₅ portant différents groupes R′ sur des complexes organo-manganeux RMnCl avec ClN(Bu)₃PhCH₂ dont le groupe R variait d'un essai à l'autre.Acylations analogous to those of Example 8 were carried out using mixed anhydrides R′COOCOOC₂H₅ carrying different R ′ groups on organo-manganese complexes RMnCl with ClN (Bu) ₃PhCH₂ whose R group varied from test to the other.
Le Tableau ci-après indique la nature des R,R′ et le rendement en cétone RCOR′ obtenue.
Comme on l'a déjà exposé précédemment, l'acylation, par R′COCl dans l'éther, de RMnBr préparé par action d'un organo-magnésien sur du bromure de manganèse non complexé, conduit à des rendements très moyens en cétone.As already stated above, the acylation, by R′COCl in ether, of RMnBr prepared by the action of an organomagnesium on uncomplexed manganese bromide, leads to very average yields of ketone.
On a essayé d'acyler par BuCOcl, un BuMnBr préparé par la technique antérieure et par un BuMnBr complexé par Bu₄NBr préparé selon l'exemple 5. Dans ces deux opérations, on ajoutait 50 mmoles de BuCOCl, sous agitation, à 52 mmoles de BuMnBr en suspension dans l'éther à -20°C. On ramenait ensuite la température à l'ambiante, et on agitait le milieu réactionnel pendant deux heures. Puis on le traitait avec 60 ml de HCl 1N à 10°C ; le phase aqueuse décantée était soumise à deux extractions, chacune avec 50 ml d'éther. Les phases organiques réunies étaient ensuite lavées avec 50 ml d'une solution saturée de NaHCO₃. On isole ensuite la cétone comme dans l'exemple 8. Le rendement obtenu selon l'art antérieur est de 54%,et avec le complexe selon l'invention de 83% en BuCOBr, ce qui met en évidence le rôle déterminant joué par la complexation de MnBr₂ lors de la préparation de BuMnBr.We tried to acylate with BuCOcl, a BuMnBr prepared by the prior art and with a BuMnBr complexed with Bu₄NBr prepared according to Example 5. In these two operations, 50 mmoles of BuCOCl were added, with stirring, to 52 mmoles of BuMnBr suspended in ether at -20 ° C. The temperature was then brought back to ambient, and the reaction medium was stirred for two hours. Then it was treated with 60 ml of 1N HCl at 10 ° C; the decanted aqueous phase was subjected to two extractions, each with 50 ml of ether. The combined organic phases were then washed with 50 ml of a saturated NaHCO₃ solution. The ketone is then isolated as in Example 8. The yield obtained according to the prior art is 54%, and with the complex according to the invention of 83% in BuCOBr, which highlights the determining role played by the complexation of MnBr₂ during the preparation of BuMnBr.
Claims (28)
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FR8816356A FR2627494B1 (en) | 1987-03-11 | 1988-12-13 | NOVEL ORGANO-MANGANEOUS COMPOUNDS, THEIR PREPARATION AND APPLICATIONS |
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FR2671085A1 (en) * | 1990-12-28 | 1992-07-03 | Elf Aquitaine | Preparation of manganous amides |
WO1995022518A1 (en) * | 1994-02-18 | 1995-08-24 | The University Of Sydney | Chemical compounds |
Citations (2)
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US3294827A (en) * | 1961-09-26 | 1966-12-27 | Gen Mills Inc | Quaternary ammonium metal compounds |
EP0283359A1 (en) * | 1987-03-11 | 1988-09-21 | Societe Nationale Elf Aquitaine | Process for the preparation of ketones |
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1989
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Publication number | Priority date | Publication date | Assignee | Title |
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US3294827A (en) * | 1961-09-26 | 1966-12-27 | Gen Mills Inc | Quaternary ammonium metal compounds |
EP0283359A1 (en) * | 1987-03-11 | 1988-09-21 | Societe Nationale Elf Aquitaine | Process for the preparation of ketones |
Non-Patent Citations (4)
Title |
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CHEMICAL ABSTRACTS, vol. 106, 1987, page 697, résumé no. 60300q, Columbus, Ohio, US; N.K. JHA et al.: "Studies on some mixed isothiocyanatohalomanganates(II)", & SYNTH. REACT. INORG. MET.-ORG. CHEM. 1986, 16(8), 1163-81 * |
CHEMICAL ABSTRACTS, vol. 66, 1967, page 6102, résumé no. 65066h, Columbus, Ohio, US; & US-A-3 294 827 (GENERAL MILLS, INC.) 27-12-1966 * |
CHEMICAL ABSTRACTS, vol. 70, 1969, page 508, résumé no. 83833t, Columbus, Ohio, US; M. GLAVAS et al.: "Thermal decomposition of some transition metal-dimethylformamide complexes", & J. INORG. NUCL. CHEM. 1969, 31(2), 291-5 * |
SYNTHESIS, no. 1, janvier 1984, pages 37-40; G. FRIOUR et al.: "Organomanganous reagents; IX1. Preparation of various halogenated, alkoxylated, aryloxylated, and arylsulfenylated ketones from correspondingly functionalized carboxylic acid chlorides or anhydrides" * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2671085A1 (en) * | 1990-12-28 | 1992-07-03 | Elf Aquitaine | Preparation of manganous amides |
WO1995022518A1 (en) * | 1994-02-18 | 1995-08-24 | The University Of Sydney | Chemical compounds |
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